Method of manufacturing radiating elements for gas heaters



- April 28, 1925.

v 1,535,473 A. H. HUMPHREY METHOD 0F MANUFACTURING RADIATING ELEMENTS FOR GAS HEATERS Filed Feb. 15. 1,921

" n a l 4 l g c i m1- 7 .'11 (1 \j@/////////////////////////////////?a l method of manufacturing radiating ele-l Patented Apr. 28; 1925.

UNITED STATES 1,535,473 PATENT OFFICE.

E. HUINLPHREY, OF NEW YORK, N. Y., ASSIGNQR T GENERAL GAS LIGHT COMPANY, 0F KAL'AMAZOO, MICHIGAN.

METHOD F MANFACTURING RADIATING ELEMENTS FOR GAS HEATERS.

Application led February 1921.. Serial No. 445,182.

To aZZ .whom t may concern:

Be it known that I, ALFRED H. HUM- PHREY, a citizen ofthe United States, residing atthe city and .county of New York, State of New York, have invented certain new and useful Improvements in Methods of Manufacturing Itadiatingl Elements for Gas Heaters, of which the following is a specification.

This inventionrelates to improvements in ments for gas heaters.V

The main objects of this invention are: to provide an improved method of manufacturing radiating elements for gas heaters. Further objects, and objects relating to structural details, will definitely appear from. the detailed description tol follow.

lI accomplish the objects of my invention by the devices and `means described in the following specification The invention is clearly defined and pointed. out in they claim.

A structure which is a preferred enibodinient of my invention is clearlyl illustrated in the .accompanying drawing, forming a" part of this specification, in which:

Fig. I is a front view o f a completed radiating element'embodying the features of my invention.

Fig. II is .an-inside view of the` front and back ortions formed in lthe process of manu acturei y Fig. III is a bottom view.

Fig. I V is a lan view of the female members of the mo d illustrating the process of manufacture.. I

Fig.-V is a, plan View o f the front mold. Fig. VI is a detail section on a line corres nding to -line 6 6 of Fig. .IV further ustratm the method'of manufacture.

Fig. VI is a detail section correspondingl tmthat of Fig. VI showing another step inV the rocess of manufacture.

Fig. III is an enlarged 4detail front elevation .still further illustrating the method ofmanufacture. M

In the.' drawing jsimilar reference charac- .ters `.re'fer to similar parts throughout. the;4 several. views'and the sectional views are' taken looking in the direction of the little arrows at the ends of the section lines.

Referring to the drawingymy improved radiating element, as illustrated, consists of -l lementary back a front portion 1l andA a com portion 2. These front an back portions are formed in molds 3 and 4, respectively, from earthy material and their edges 5 and i pressed together while still in theplastic state and united by firing. Thefront and rear portions are of suitable openwork and are preferably provided with inwardly projecting spurs 7.

The material from which the parts are molded is preferably in the form of strips 8 of uncolored earthy material which is laid upon the molds, as illustratedin Figs. IV i and VI, and pressed into the mold-by the male mold members 9.

The face of the radiating ,element is shaded or partially colored, as at 10, by embedding therein granules 11 ofl colored earthy material. This is effected by sprinkling the granular colored material into the `molds and pressing the plastic strips thereon, thereby embedding the colored material so that when the element is fired it becomes an integral part thereof.

I'thus produce radiating elements having shaded or partially colored front surfaces, the remainder of the elements being uncolored. This is of material advantage in radiating elements which are very neat and attractive in ap earance and, further, the discolorations of) age or use are not apparent. The surface thus colored does not detract from the radiating quality or the incandescent glow of the main or body por-- tion of the element.

ored plastic material and embedding in the surface of the front portions granules of colored earthen material, lsaid front' and back portions being otherwise .uncolored providing unc'olored rear and inner joining plastic, and firing.

surfaces,

In 1witness whereof, I have hereunto setA m handand seal in the presence; of' two wltnesses'. j ALFRED "11. HUMPHREY. [1.8.] Witnesses:` ANNIE E. PARRY,

V. SAXTON.

the front and back portions while. 

